Sphinx'LostNose 0 Newbie Poster

How much of a source language's characteristics and ways of doing things is seen in a compiled executable?

Let's say you use C++ and BASIC (compiled) to write 2 programs that functionally do the same thing. You compile them both on the same computer(and OS of course). How different will they be from each other, as far as machine instructions they use? How much of the executable is specific to the source language and compiler?